US3764573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of prepregs
Assignee: General Electric Co
•
Filing: 1970-10-29
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Granted: 1973-10-09
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Expires: 1990-10-29
Abstract
Abstract Resin-bonded composite materials having improved high temperature characteristics are provided by utilizing theta solvents for the resin.
Inventors
- 👤 R Jablonski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:06
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B5/02; C; C08; C08J; C08J5/00; C08J5/24; C08J5/241; C08J5/243; C08J5/244; C08L; C08L79/00; C08L79/04; C08L79/08; C08L79/085; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2262/00; B32B2262/10; B32B2262/101; B32B2262/106; B32B2305/00; B32B2305/07; B32B2305/076; C08J2379/00; C08J2379/04; C08J2379/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
17 words
A solution as in claim 1 wherein said solvent comprises at least 80 percent by volume dioxane.
Claim 2
Dependent Claim
18 words
A solution as in claim 1 wherein said solvent comprises at least 80 percent by volume 2-methoxyethyl acetate.
Claim 3
Dependent Claim
17 words
A solution as in claim 1 wherein said solvent comprises at least 80 percent by volume 1,2-dimethoxyethane.
Claim 4
Dependent Claim
23 words
A solution as in claim 1 wherein said solvent is diluted with up to about 20 percent by volume of a hydrocarbon solvent.
Claim 5
Dependent Claim
12 words
A prepreg of base material impregnated with the solution of claim 1.
Claim 6
Dependent Claim
15 words
A prepreg as in claim 6 in which said base material is of glass fiber.
Claim 7
Dependent Claim
15 words
A prepreg as in claim 6 in which said base material is of graphite fiber.
Claim 8
Dependent Claim
17 words
A prepreg as in claim 6 in which said base material is of high temperature resistant fiber.
Claim 9
Dependent Claim
13 words
A prepreg as in claim 6 in which said base material is micaceous.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |